Apparatus for producing animal food



1933- c. SCHLOTTERHOSE APPARATUS FOR PRODUCING ANIMAL FOOD Filed Jan.30. 1931 UNETED STATES PATENT GFFEE APPARATUS FOR PRODUCING ANIMAL FOODConrad Schlotterhcse, Wesermunde-Wulsdorf, Germany Application .ianuary30, 1931, Serial No. 512,426, and in Germany November 26, 1930 2 Claims.

The invention can be carried out in various manners. Two forms ofconstruction are illustrated by way of example in the accompanyingdrawing, in which Fi 1 shows the apparatus in longitudinal section.

Fig. 2 is a side elevation of Fig. 1.

Fig. 3 is a section on line IIIIII of Fig. 1.

Fig. 4 is a section on line IVIV of Fig. 1.

Fig. 5 shows diagrammatically a modified form of construction in frontelevation.

horizontal completely closed drum 0. with heating jacket I) serves forsterilizing the material, connection for direct steam supply also beprovided specially for the sterilization of slaughterhouse refuse. Thissterilization is carried out at a more or less high temperatureaccording to the material to be treated, fish waste or slaughterhouserefuse. A stirring mech anism d mounted on a shaft is built into the a,and effects a thorough working of the material, thus enabling a uniformsterilization, this stirring mechanism also conveying the terial to adischarge aperture 0. The raw ma terial is charged through an easilyclosable aperture and after sterilization passes out into a drum hsituated thereunder, through the dis-- charge aperture 9, which can beclosed by a shutter g. The transition from the upper drum s to the lowerdrum it may be either direct or, as shown in the drawing, withinterposition of a drum 0 hereinafter described, provided with conveyingmechanism and serving chiefly for cooling. The drum it also has aheating jacket h]. and a stirring mechanism It mounted on a shaft 2',said mechanism thoroughly working the material and conveying it to thedischarge aperture l. The material passes through the aperture Z into alaterally arranged elevator, the buckets n of which convey the materialto a separate apparatus, for example the drum 0. This drum 0 also has ajacket p which is arranged so that the material contained in theapparatus may be cooled by introducing cooling water into the jacket p.At the same time air can be supplied in any suitable manner through. avent q adjustable by a shutter or the like.

As soon as the glue is bound in the material, this drum 0 may also beemployed for drying by admitting steam into its jacket 10.

A separa e stirring mechanism 8 is mounted on a shaft 7 of the drum 0and removes the material from the elevator m. The material can also bereturned to the drum h from the ve filed application in Germany underdate av. 36, 1930 in Great Britain Jan. 9, 1931.

In the existing fish and slaughterhouse refuse utilization plants noparticular difficulties exist in the treatment or" material containingfat, both in continuous and also in intermittent workin Forintermittent, so-calied working in charges ordinary horizontal apparatusare sufficient with double heating jacket and built-in stirring mech-:mism which thoroughly works the material and thus enables a uniformrying. Rotary drying drums provided with steam jacket may also beemployed for this purpose.

However the Working of lean material, that is in which not more than 2to 3% of oil is contained in the dry product, presents the difficultythat, as soon as a certain percentage of moisture is removed, the glueproducing fibres adhere to the beating walls and impede or entirelyprevent further drying. Consequently the time of treating a charge isconsiderably prolonged and in many instances the drying must even beinterrupted in order to clean the heating surfaces. Moreover it has beenpositively ascertained, that t -e adhering portions are charred orburned, so that the quality of the resultant finished product (meat orfish flour) is detrimentally aiiected. It has been endeavcured toovercome this objection by drawing off 39 the glue liquor aftersterilization, the remaining material, which has no longer any tendencyto cake, being then dried without trouble. This method is however, opento the objection that, by drawing oil the glue liquor, importantnutritive substance (nitrogen compounds) are lost so that the quality ofthe finished product is considerably lowered.

All these objections are obviated by the invention, which consists inthat the adhesive property of the glue, which causes the caking on theheating surfaces, is neutralized by a single or repeated cooling of thematerial between the heating periods, if necessary under vacuum or withthe admission of air during the individual working periods.

Owing to the sudden cooling of the sterilized material as soon as itsmoisture has sunk to a certain degree, it loses its adhesive property.The subsequent final drying to the desired degree of moisture can easilybe effected without any dange that the material will cake on the heatingsurfaces.

Further features of the invention consist in the special construction ofthe apparatus for carrying out the method.

drum 0 through a suitable chute 25 also adapted to be closed by ashutter t In this manner it is possible to obtain a circulation of thematerial within the drLun h and the drum 0, the material beingalternately heated and cooled. After the binding of the glue the dryingtakes place in both drums, the vapors produce being sucked oil throughdischarge pipes u by means of an exhauster or a vacuum pump. However atthe same time the drum 0 above the lower drum, h is extended so that thefinished material is supplied to a discharge chute 22 which can beclosed by a shutter 01 and, on the chute 1) being opened, the materialcan be sacked at this point, the chute t being closed by the shutter Asthe emptying is efiected through the drum 0, the finished material canat the same time be cooled by supplying cooling water into the jacket10, so that it is directly ready for sacking, and a separate cooling inthe air is therefore not necessary. This is very desirable in theinterests of good quality and durability of the finished material.

Fig. 5 shows the apparatus for continuous working. In this instance thematerial is introduced into the sterilizing chamber a, whence it passesinto the drying chamber h, from this through the aperture E into thecooling chamber 0, hence again into a drying chamber h and from hereinto a second cooling chamber 0 and then into the final drying chamberw.

All the chambers are provided with stirring mechanisms and conve devicesso that the material is sterilized, preliminarily dried, cooled, againdried and finally dried in continuous working. The arrangement may besuch that an alternating cooling and drying may be repeated severaltimes.

Evidently the device for continuous working can also be constructed in adifferent manner.

The apparatus may be erected either on land or particularly directly onboard ship. It presents the advantage of requiring a minimum amount ofspace. A further advantage is, that it is capable of working in anyposition.

The jacket p of ti e cooling chamber may also be connected to heatingdevices by connecting sockets in order, if necessary, to employ thischamber 0 also for drying as above indicated.

I claim:-

I. In apparatus of the class described, an elongated tubular cookingchamber, an elongated tubular drying chamber spaced below the cookingchamber and parallel thereto, a third elongated tubular chamber oppositethe space between said cooking and drying chambers and parallel to saidchambers, a tube leading downwardly from the lower part of the firstchamber at one end of the third chamber and communicating with thelatter at the upper part thereof, a cutoff slide in said tube adjacentthe first chamber, a second tube leading downwardly from the lower partof the third chamber at the other end thereof and opening into thesecond chamber at the upper part thereof, means to selectively heat andcool the third chamber whereby material in the said third chamber isalternately heated and cooled, a conveyor housing into which the firstand second chambers open at one end of each, and a conveyor in saidhousing whereby material may be conveyed from the second to the thirdchamber without passing through said tubes.

2. In apparatus of the class described, an elongated tubular cookingchamber, an elongated tubular drying chamber spaced below the cookingchamber and parallel thereto, a third elongated tubular chamber oppositethe space between said cooking and drying chambers and parallel to saidchambers, a tube leading downwardly from the lower part of the firstchamber at one end of the third chamber and communicating with thelatter at the upper part thereof, a cut off slide in said tube adjacentthe first chamber, a second tube leading downwardly from the lower partof the third chamber at the other end thereof and opening into thesecond chamber at the upper part thereof, means to selectively heat andcool the third chamber whereby material in the said third chamber isalternately heated and cooled, a conveyor housing into which the firstand second chambers open at one end of each, and a conveyor in saidhousing whereby material may be conveyed from the second to the thirdchamber without passing through said tubes, said housing being providedwith an adjustable air admission port.

CONRAD SCI-ILOTTERHOSE.

